Taking full (and ethical) advantage of Iceland's natural surroundings, Secret Solstice has always offered adventures found at no other festival on earth.

It's the only place you can party in a glacier to acts like Skream or Kerri Chandler. And because it takes place over the summer solstice like its name suggests, the sun never sets while you're there—you can even hop on a party boat at midnight and dance like it's midday.

And true to form, this year they've added a new natural wonder to the itinerary with two exclusive events inside natural subterranean arteries formed by 5,000-year-old lava tubes.

A handful of guests will be treated to an acoustic concert by an Icelandic artist on the 17th and 18th of June inside these centuries-old caves.

The lava cave, image provided by festival

Because Secret Solstice is so intertwined with the country's nature, it's claimed "carbon neutral" status for two years in a row, using the country's geothermal energy to power the festival, while partnering other carbon neutral brands like Icelandic Glacial water to help keep things green.

While the lava tube artists are still under wraps, headliners for Secret Solstice 2017 include the Foo Fighters, The Prodigy, Rick Ross, Seth Troxler, Kerri Chandler, Dubfire and more.

If you'd like to find out how to get tickets to this concert in a lava chamber, or the festival itself, head here.

And to read our review of last year's festival where we partied inside a glacier, head here.